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Analog Devices Inc. AD8663ARZ
- Part No.:
- AD8663ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8663ARZ.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:931
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Product details
Overview
AD8663ARZ from Analog Devices is a single, rail-to-rail output, precision CMOS operational amplifier optimized for low-noise, low-input-bias-current sensor signal conditioning. It delivers 175 µV max offset voltage, 23 nV/√Hz voltage noise, and 300 fA typical input bias current at 5 V supply, operating from 5 V to 16 V over −40°C to +125°C. It is widely deployed in photodiode amplification and pH meter front ends.
For engineers reviewing the AD8663ARZ datasheet, AD8663ARZ pinout, AD8663ARZ application, or AD8663ARZ equivalent, key selection criteria include its guaranteed 175 µV max offset at 5 V, 275 µA max supply current per amplifier, rail-to-rail output swing (e.g., 4.95 V high / 25 mV low at 100 µA load), 520 kHz gain bandwidth, and SOIC-8 package compatibility with legacy layouts.
Technical Context
The AD8663ARZ employs Analog Devices' patented DigiTrim® trimming to achieve precision DC performance without laser trimming, enabling stable offset voltage (≤175 µV) and ultra-low drift (1.5 µV/°C typ). Its CMOS input stage delivers femtoampere-level input bias current critical for high-impedance transducer interfaces.
Designed for single-supply operation from 5 V to 16 V (or ±2.5 V to ±8 V dual), it features rail-to-rail output swing, unity-gain stability with 20 pF capacitive load, and robust PSRR (95 dB min) - making it suitable for battery-powered instrumentation where supply rejection and dynamic range are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | Max 175 µV at 5 V supply - ensures ≤0.035% error in 5 V full-scale precision gain stages. |
| Input Bias Current | Typ 300 fA at 25°C - enables accurate amplification of signals from >1 GΩ source impedances (e.g., pH electrodes). |
| Supply Current | Max 275 µA per amplifier - supports multi-channel, low-power portable instruments with <1 mW per channel. |
| Voltage Noise Density | 23 nV/√Hz at 1 kHz - preserves SNR in low-frequency sensor front ends (e.g., thermopiles, strain gauges). |
| Gain Bandwidth Product | 520 kHz at 5 V - sufficient for closed-loop gains up to ~50 with DC–10 kHz signal bandwidth. |
| Output Swing | Rail-to-rail: VOL = 25 mV / VOH = 4.95 V at 100 µA load - maximizes usable dynamic range into 12-bit ADCs. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive sensors and industrial process control hardware. |
Pinout & Package
The AD8663ARZ is packaged in an 8-lead SOIC_N (R-8) with standard pinout and exposed pad not connected (NC). Pin 1 is index-marked; exposed pad may be left unconnected or tied to V– per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | No Connect (NC) | Internally unused; must remain unconnected per datasheet Note 1. |
| 2 | Inverting Input (–IN) | Differential input node; high-impedance CMOS node sensitive to PCB leakage. |
| 3 | Non-Inverting Input (+IN) | Differential input node; matched to –IN for common-mode rejection. |
| 4 | Negative Supply (V–) | Ground reference for single-supply use; connects to system GND or negative rail. |
| 5 | No Connect (NC) | Internally unused; must remain unconnected. |
| 6 | Output (OUT) | Class AB rail-to-rail output capable of sourcing/sinking ≥1 mA. |
| 7 | Positive Supply (V+) | Primary power input; supports 5 V to 16 V operation with 95 dB PSRR. |
| 8 | No Connect (NC) | Internally unused; must remain unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® trimming | Enables factory-trimmed 175 µV max offset without external calibration or laser adjustment. |
| Rail-to-rail output | Delivers >99% of supply rail swing (e.g., 25 mV above GND / 4.95 V below V+) at light loads. |
| Ultra-low input bias current | 300 fA typical enables direct interfacing with photodiodes and electrochemical sensors without guard rings. |
| Wide supply range | Operates from 5 V to 16 V single supply - eliminates need for charge pumps or LDOs in 12 V systems. |
| Extended temperature grade | Specified from −40°C to +125°C - supports deployment in engine control units and industrial PLC I/O modules. |
Applications
| Photodiode Amplification | pH and ORP Meter Front End |
|---|---|
Use Scenario: Converting weak current from a reverse-biased silicon photodiode into a stable voltage signal in optical smoke detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier with 300 fA input bias minimizing dark current error and 23 nV/√Hz noise preserving signal integrity. Use Value: Enables detection of sub-nA photocurrents with <10 µV RMS noise floor in 1 Hz–10 kHz bandwidth. | Use Scenario: Buffering high-impedance glass electrode outputs (≥100 MΩ) in handheld pH meters used in food safety testing. IC Role / Device Role / Timing Role: Electrometer-grade buffer with 300 fA input bias preventing electrode polarization and drift. Use Value: Maintains measurement accuracy within ±0.01 pH over 24 hours without recalibration due to ultra-low bias current. |
| Low-Power ADC Driver | Medical Diagnostic Instrumentation |
Use Scenario: Driving the input of a 12-bit SAR ADC in a battery-powered IR thermometer with 10 kSPS sampling. IC Role / Device Role / Timing Role: Precision gain stage and level shifter delivering rail-to-rail output compatible with ADC reference rails. Use Value: Achieves ENOB >11.5 bits while consuming only 275 µA, extending AA battery life to >12 months. | Use Scenario: Signal conditioning for ECG lead-off detection circuitry in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier in analog front-end filtering and amplification path before digitization. Use Value: Supports <1 µVpp input-referred noise in 0.05–100 Hz band, meeting AAMI EC11 clinical requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture; 0.02 µV/°C offset drift vs. AD8663ARZ's 1.5 µV/°C; higher quiescent current (17 µA vs. 275 µA). | Better for DC-critical applications (e.g., precision weigh scales); less suitable for battery-constrained designs. | Select OPA333AIDBVR when microvolt-level long-term drift dominates design requirements over power budget. |
| ADA4522-1ARZ | Zero-drift, 2.5 µV max offset, 5.6 nV/√Hz noise, but 730 µA supply current and only specified to +105°C. | Superior DC precision and lower noise, but higher power and narrower temp range limits use in extended industrial environments. | Choose ADA4522-1ARZ when sub-µV offset and ultra-low noise outweigh thermal and power constraints. |
Compared with OPA333AIDBVR and ADA4522-1ARZ, the AD8663ARZ offers the best balance of ultra-low bias current (300 fA), low noise (23 nV/√Hz), wide temperature range (−40°C to +125°C), and micropower operation (275 µA) - uniquely suited for high-impedance, battery-powered sensor interfaces where zero-drift isn't mandatory.
Availability
AD8663ARZ is available at Aetrix Electronics and suitable for photodiode amplification, pH/ORP meter front ends, and low-power ADC driver applications requiring stable component supply across automotive, industrial, and medical production programs.
Supply support for AD8663ARZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD866x family was designed specifically for precision, low-power, high-impedance sensor signal conditioning - targeting applications like electrometer circuits, transimpedance amplifiers, and portable medical diagnostics where femtoampere bias and nanovolt noise are critical.
FAQ
What is the maximum supply voltage rating for the AD8663ARZ?
The AD8663ARZ has an absolute maximum supply voltage rating of 18 V, with recommended operating range from 5 V to 16 V. Operation beyond 16 V is not characterized and may compromise long-term reliability or parametric performance. The device is fully specified at both 5 V and 16 V supplies per its Rev. D datasheet Tables 1 and 2.
Does the AD8663ARZ require external compensation for unity-gain stability?
No, the AD8663ARZ is internally compensated and unity-gain stable - it drives capacitive loads up to 20 pF without oscillation, as verified in Figure 19 (closed-loop gain vs. frequency) and Figure 25 (overshoot vs. load capacitance) of the Rev. D datasheet. No external compensation components are needed for standard unity-gain buffer configurations.
What is the function of the NC pins on the AD8663ARZ SOIC package?
Pins 1, 5, and 8 of the AD8663ARZ in SOIC-8 (R-8) package are No Connect (NC) terminals - they are not bonded internally and must remain unconnected per datasheet Note 1. Connecting them risks latch-up or parametric degradation; PCB layout should omit traces or vias to these pins.
Can the AD8663ARZ operate from a single 3.3 V supply?
No, the AD8663ARZ requires a minimum supply voltage of 5 V per its Absolute Maximum Ratings table and electrical specifications. At 3.3 V, the internal biasing fails to meet rail-to-rail output swing, offset voltage, and gain specifications - the device is not functional or characterized below 5 V.
Is the exposed pad on the AD8663ARZ thermally or electrically connected?
The AD8663ARZ in SOIC-8 (R-8) packaging does not feature an exposed pad - that structure applies only to the LFCSP variant (AD8663ACPZ). The SOIC version (AD8663ARZ) uses standard gull-wing leads; thermal dissipation relies on PCB copper area connected to pins 4 (V–) and 7 (V+), with θJA = 121°C/W per Table 4.
AD8663ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- DigiTrim®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 540 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.3 pA
- Voltage - Input Offset:
- 40 µV
- Current - Supply:
- 230µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8663ARZ FAQ
1.How can I place an order for AD8663ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8663ARZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD8663ARZ reliable?
The price and inventory of AD8663ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8663ARZ is usually 5 days.
3.What payment methods are accepted for AD8663ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8663ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8663ARZ?
AD8663ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8663ARZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD8663ARZ?
For technical support, including AD8663ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8663ARZ requirements.
6.How does Aetrix verify that AD8663ARZ is sourced from the original manufacturer or authorized distributors?
All AD8663ARZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD8663ARZ meets industry standards.
7.What is the process for return or replacement of AD8663ARZ?
All AD8663ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8663ARZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD8663ARZ part is unused and in its original packaging.
Return procedure for AD8663ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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